Originally Posted By: car51
Originally Posted By: Gokhan
Originally Posted By: oil_film_movies
Gokhan's Shell graphs basically prove QSUD is GTL.
That's not clear. It could also be plain Group III. The plots I have are for CCS @ -20 and @ -30 °C. The datasheet has CCS @ -25 °C. If you interpolate, it looks more like plain Group III than GTL to me.
I love how you always speculate. Saying "it LOOKS more like"
Present actual facts please
Thanks
Another reason why I like reading SR5's info instead of your heresay
Is reading the CCS value from the datasheet and inserting into the plot to see if it's Group III or GTL speculation?
The datasheet says CCS @ -25 °C is 3750 cP. Insert this into the first plot and you get NOACK about 2% for GTL. However, that graph is for -30 °C. CCS would be a lot more at -30 °C than at -25 °C. So, this would give a NOACK between 0 to 1% for a 10W-30 with 3750 cP CCS (@ -25 °C) made of GTL, according to the plot. Datasheet says 5%, which puts it in Group III rather than GTL.
However, Shell's GTL has been of low quality and of high NOACK as I said. They operate their gas-to-liquid reactors in Qatar quick and dirty just to reach Group III quality instead of what GTL is really capable of. So, it could still be cheap, low-quality Shell Qatar GTL.